Роль белка mod(mdg4)-67.2 во взаимодействиях между su(hw)-зависимыми комплексами и их рекрутировании на хроматин
- Авторы: Мельникова Л.С.1, Молодина В.В.1, Георгиев П.Г.1, Головнин А.К.1
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Учреждения:
- Институт биологии гена Российской академии наук (ИБГ РАН)
- Выпуск: Том 89, № 4 (2024)
- Страницы: 583-593
- Раздел: Статьи
- URL: https://ter-arkhiv.ru/0320-9725/article/view/665766
- DOI: https://doi.org/10.31857/S0320972524040033
- EDN: https://elibrary.ru/ZGKHCS
- ID: 665766
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Аннотация
Белок Su(Hw) (Suppressor of Hairy-wing) принадлежит к классу белков, которые организуют архитектуру хромосом, определяют активность промоторов и участвуют в формировании границ/инсуляторов между регуляторными доменами. Этот белок содержит кластер из 12 цинковых пальцев типа С2Н2, часть из которых отвечает за связывание с консенсусным сайтом. Su(Hw) образует комплекс с белком Mod(mdg4)-67.2 и белком CP190 (Centrosomal protein 190kD), связывающимся со всеми известными инсуляторами дрозофилы. Для дальнейшего изучения функционирования Su(Hw)-зависимых комплексов мы использовали ранее описанную мутацию su(Hw)E8, которая инактивирует седьмой цинковый палец, в результате чего мутантный белок теряет способность связываться с консенсусным сайтом. В представленной работе показано, что белок Su(Hw)E8 продолжает напрямую взаимодействовать с белками CP190 и Mod(mdg4)-67.2. Через взаимодействие с Mod(mdg4)-67.2 белок Su(Hw)E8 может привлекаться в состав формирующихся на хроматине Su(Hw)-зависимых комплексов и усиливать их инсуляторную активность. Результаты работы демонстрируют, что не связанные с ДНК Su(Hw)-зависимые комплексы могут рекрутироваться на Su(Hw)-связывающие сайты через специфичные белок-белковые взаимодействия, которые стабилизируются Mod(mdg4)-67.2.
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Об авторах
Л. С. Мельникова
Институт биологии гена Российской академии наук (ИБГ РАН)
Автор, ответственный за переписку.
Email: lsm73@mail.ru
Россия, Москва
В. В. Молодина
Институт биологии гена Российской академии наук (ИБГ РАН)
Email: lsm73@mail.ru
Россия, Москва
П. Г. Георгиев
Институт биологии гена Российской академии наук (ИБГ РАН)
Email: lsm73@mail.ru
Россия, Москва
А. К. Головнин
Институт биологии гена Российской академии наук (ИБГ РАН)
Email: lsm73@mail.ru
Россия, Москва
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